Scientists claim to have finally found a “plausible theory” for sightings of the Loch Ness Monster. She’s not an aquatic reptile left over from the Jurassic era or a circus elephant that got in the water to bathe with her trunk aloft. If Nessie ever existed at all, she was most likely a giant eel, according to a new scientific survey of the loch.

Starting with an Irish missionary’s report of a monster in the River Ness in 565AD, repeated sightings in the modern era have kept Scotland’s greatest myth alive. The most famous of which is a grainy photo from 1934 which appears to show the shadowy outline of a long-necked creature, bobbing on the water’s surface.